From Politico:

“There are very few folks with experience equivalent to those who worked on the Starr investigation,” said Paul Rosenzweig, a former senior counsel on the Whitewater team and now a senior fellow at the nonprofit R Street Institute. “It was a unique moment in history that cannot be replicated directly. He, alone among the court members, would have direct personal experience that could inform his judgment, should the court be asked to review any of Mueller’s activities.”